Legis
Manufacturing
AB 1901, Chapter 719, Statutes of 2026 · Monday 28 September 2026

Children’s diapers: intentionally added ingredients: disclosure

California requires ingredient disclosure online and on packages for children’s diapers by 2029.

Parents and caregivers will be able to identify intentionally added diaper ingredients, their CAS numbers, and their purposes. Noncompliant diapers cannot be sold, distributed, or manufactured in California.

What the law does ​

  • Requires manufacturers by January 1, 2029, to post a publicly identifiable webpage for each diaper product listing all intentionally added ingredients by weight, with each ingredient’s name, CAS number, and function.
  • Requires diapers manufactured or distributed in California by January 1, 2029, and diapers sold in California by July 1, 2029, to list all intentionally added ingredients and a link to the manufacturer’s disclosure webpage on the outer package.
  • Authorizes the Department of Toxic Substances Control to enforce the requirements and issue regulations.
  • Sets administrative penalties of up to $5,000 for a first violation and up to $10,000 for each later violation, including per day for continuing violations.
  • Deposits collected penalties into the Toxic Substances Control Account.

Who it affects ​

  • Manufacturers of children’s diapers, including disposable briefs, protective underwear, liners, boosters, inserts, and underpads.
  • Sellers and distributors of children’s diapers in California.
  • Parents, caregivers, and other diaper purchasers.

Context ​

Children’s diapers include their components, such as wetness indicators, absorbent materials, outer shells, adhesive tabs, dyes, and fragrance.